Initial Commit

ViewportRestrictions/InjectionDelegateRestriction.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Microsoft.Research.DynamicDataDisplay.ViewportRestrictions
+{
+	public delegate DataRect ViewportRestrictionCallback(DataRect proposedDataRect);
+
+	public class InjectionDelegateRestriction : ViewportRestriction
+	{
+		public InjectionDelegateRestriction(Viewport2D masterViewport, ViewportRestrictionCallback callback)
+		{
+			if (callback == null)
+				throw new ArgumentNullException("callback");
+			if (masterViewport == null)
+				throw new ArgumentNullException("masterViewport");
+
+			this.callback = callback;
+			this.masterViewport = masterViewport;
+			masterViewport.PropertyChanged += masterViewport_PropertyChanged;
+		}
+
+		void masterViewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)
+		{
+			if (e.PropertyName == "Visible")
+			{
+				RaiseChanged();
+			}
+		}
+
+		private Viewport2D masterViewport;
+		private ViewportRestrictionCallback callback;
+
+		public override DataRect Apply(DataRect previousDataRect, DataRect proposedDataRect, Viewport2D viewport)
+		{
+			return callback(proposedDataRect);
+		}
+	}
+}